Marty, a musician, frequently plays at large parties and nightclubs. Marty has musical equipment worth $8,000, and he takes precautions to prevent theft. The marginal benefit of these precautions is given by MB = 60 – 3A, where A is the number of precautions Marty takes. The marginal cost of preventing theft (i. e., the time, energy, and effort expended) is given by MC = 2A. Suppose Marty purchases full insurance that pays him $8,000 if his gear is stolen. What is Marty's optimal level of precautions?

You are thinking of making your mansion more energy efficient by replacing some of the light bulbs with compact fluorescent bulbs, and insulating part or all of your exterior walls. each compact fluorescent light bulb costs $4 and saves you an average of $2 per year in energy costs, and each square foot of wall insulation costs $1 and saves you an average of $0.20 per year in energy costs.† your mansion has 150 light fittings and 3000 sq ft of uninsulated exterior wall. to impress your friends, you would like to spend as much as possible, but save no more than $750 per year in energy costs (you are proud of your large utility bills). how many compact fluorescent light bulbs and how many square feet of insulation should you purchase? how much will you save in energy costs per year? (if an answer does not exist, enter dne.)

Alocal barnes and noble bookstore ordered 80 marketing books but received 60 books. what percent of the order was missing?

Identify at least 3 body language messages that project a positive attitude